Answer:
1/132
Explanation:
Each of the pencils has a different color.
1 pencil is orange.
1 pencil is green.
Original number of pencils: 12
First pick: 1 orange pencil out of 12
p(orange) = 1/12
Second pick: 1 green pencil out of 11
p(green) = 1/11
Overall probability:
p(orange then green) = 1/12 × 1/11 = 1/132